Process of manufacturing piston rings



I Oct .21, 1930. EHRIOTITUSCH ,7

PROCESS -OF' MANUFACTURING PISTON'RINGS Filed July 28, 1926 3 Sheets-Sheet l 1 1m. w mwrmmm /z; wrrnml /Z 1. Ag w m l luml A 'IHJHHII 9 13 15 INVENTOR.

-Mi xm w ATTORNEY.

Oct. 21, 1930 O T H 1,778,899

, PROCESS OF MANUFACTURING PISTON RINGS Filed-J l 28, 1926 3 Sheets-Sheet 2 //J. Hill/0 v i EIll IIIIIIIHI y mw/mvzv A TTORNE Y.

Oct. 21, 1930. KQTTUSCH 1,778,899

PROCESS OF MANUFACTURING PISTON RINGS Filed July 28,1926 5 Sheets-Sheet s A TTORNE Y.

, I Patented 9on2],

mm;' oFncg-j.

' Em Ko'rcrUson, or :on'rnorr, MIor rGAiT rnocnss or vrAnurnornnmsrrsron nines v 7 7 h Apphcationfiled July .28 Myfinvention relates to an improved proof ess of manufacturing piston'packing rings. The mainflobject of the present invention is to provide an eflicient method whereby may be expedited the manufacture of a packins rin ada )table aarticularlv for usein'the c z: i l o grooves of an lnternal combustion engine p ston and, which ring is so constructed that 1t yieldingly engages both the side walls of the '7 -10 groove within'which it is seated, as well as against the wall'ofv the cylinder, in-a manner to. prevent leakage ofzcompression or oil pumping and accomplishes these desirable results without the employment of auxiliary spring devices of any character whatsoever.

As illustrated in the accompanying drawmgs, my lmproved packing ring s shownas provided with radially longitudinally slitted portions adjacent to the solid portionsof the ring structure, which longitudinally s'litted portions have an axial'dimensiongreater than that of the solid portions so that when the packing ring is disposedwithin a groove of the slitted' portions of the ring snugly engage the side walls of thegroove'. "A referred construction is to provide opposed "slitted portions separated by, opposed -a piston solidportions and to so form each axialiace ofthe ring that it tapers from a point midway each slittedportion to a point of least axial dimension midwayeach solid portion.

Theobject of the present inventionis to provide a new method orplrocess for making my improved packing ring, whereby its maniufacture is greatly facilitated and cheapened a'ndproduction increasedl through the development of theimprovedjmethod of its 7 construction which forms the subject of the present application,v and 'which method or process consists in providing a ring blank slitte'd portions, supporting this; blank with one axial t face upon a suitable support-jwhi'ch -is of such a character that the ring structure is subjected to thelinfiuenceof a magnetic field whereby the. slitted portion or portions ,of the ring are drawntog'ethertoward the sup-' ported axial face,'anfd then passinga forming toolover the' expos'edfaxial facealong apath 59 parallelinganZ'ax;1a1; pla11elof'tlie ring, said shown my improved packing ring with, one axial-face only cut awaytoprovide the slitted {portions with a greater axial dimension than the solid portions,

.socut away. with the desired number oflongitudina'lly. 1

The ring shown in "substantially 192e, semi m. 125,459. I

tool removing material from the solid or; ,tion or portions of thelring in excess of that removed from the slitted portion.

= 'The ring may thenv be reversed'upon its support and theopposite axial facesubj ected to the same treatment, andflupon the completion of the forming, operations and the removal of the ring from said. support,- said ring will assume the form shown inFigures 5and6.v 7

Other object sand g '1 ent improved .method of manufacturewill more; fully 1 appear;fromstherfollowing ide;

scription, appended claims,;and accompany: ing drawings, in which: j v Figure 1;. is 'aper'spectiveview; of my; im proved" packing ring, illustrative of; step in the process of itsginanufacture; f j.

Fig. 2 is a side elevationof the'ring illusr ng' furth r epaf 1 5 Fig. 3 is 'asi'le elevationof the. packing ring shown in Figure-2 and taken at right angles to. that, view;.-- 1

1 Fig. 4 is a perspective I view to i of Figure 1;

Fig. 5 is a side elevation iillustrative of 1 another step in thepro'cess; f '7 I n Fig ..6isa side elevation ofthe ring shown .in Figure 5 and .taken'at an angle of 909 With'respect thereto and :8

Fig. 7 is 'a perspective V1831; of suitable .,,me'ans for'usejn carrying out the process embodying the present invention, v r v In Figs. ,1, 2, and 3,- of the drawing Ihave throughout.itsgc-ircumiference.

12. One ofthesolid v axial faces of It is my desiretoso shape the ring structure that it will have a greater axial dimension midway the slitted portions than at the solid portions. This may be accomplished by grlnding away either one or both of the the ring as hereinafter described;- e i; i a

I have developed an improved method of shaping either one or both of the axialfaces of the ring which consists in supporting the. ring upon one axial face on "a magnetic chuck structure indicated ina;Eig at, 1 6,.

and the ring is indicated at 18in this figure.

The ring, under the influenceotithe magneticj 7 to the fixed posit'ion' of these portions? The complete ring structure p solid portions 12 and slittedportions IEOwhich" havebeensurfacedon both axialfacesinjthe v V forming'operation may be continued as desired. Upon-"completion, of the" forming operation oath-eons axial face, the} ringmay be reversedupon itsf'supportl and" the opposite axial face simiiarlyfini'shea It is. optional whether or not" both axial faces be treated in' this manner.-* Figs. 2" and 3 the completed'ring structure, shows solid portions 12 and slitte' d portions 10} IIlthQSe figures-of the drawing the slitted portions have been surfaced in themanneri described on one-axial, face-only. 'InEigs. 5 andl6'the illustrated] shows 1. That step inthe method} of forming 'a packing" ring with opposed radially longitudinally slitted portions of greater axial dimension than intervening solid portions, which consists in supporting the-ringupon on'e*'a xial' face and subjecting the salmon influence offa magnetic field sufiici'ent to draw the unsupportedi slitted portions of the ring"towardthesupported portions and toward the {sup orted farce; passing" a forming tlon th tool over; the exposed axial face of the ring rm to remove material from the' solid "org V a V P ej. ring 1'n excess of thati-removed from he slltte'd portions and removing the flamers-su ort upon the completion v -'soli "llliat step in the process of for ing a packing ring with: a radially slitted portion of greater" axij'al dimension" than an adjacent same while in ia ea apea sa'idsuppdrt, tothe axis;

ring, while the subjecting the l influence of a magnetic field sufficient to draw the unsupported part of the slitted portion of the ring toward the supported part, and then removing metal from-the exposed axial face of the ring to form an axial face lying in That'step in" the process of forming a slitted. portion of greater axial dimension than an adjacent-solid portion which consists in suppor-ting theiring upon one axial face within the influence of a magnetic field sulficient to 'dnaw th'eseparate parts ofthe slitted a plane. at right angles to the ring packingring'with a radially longitudinally v exposed axial" race of the ring alon'g a; path parallelto an axial plane: of; the ring -=to:r1-emove material from'theslitte'd portion ofthe ring in excess of'that removed from theis'olid pQllBlGII and'removlng the mug from thesups port upon thecompletion ofthe forining ops 4.; The method offorming an axial face of a 7 ring having a" ra diall y longitudinally slitteid portion so that such slitt'ed' portion *of the ring will have an axial "dimension greater than the "ZtXlll (llIIlQIlSl'OIl of an ady 'acent solld.

portion which consists magnetically*clnawing the separate parts ofthe slittedfportiQn toward" each" other and' passing a; forming tool'over an 'axiahfaceofthe ringa. V

That method of forming anaaxial face offa 'p a'cki n'gring'havih radially longitm dinall'y sjlittedportion adjacent to a solid por f V tion so that such-axial f'acerwil'l present anwirregular 'contour;.which consistsdn magnetical- 1y drawing" one p'art of the sllttedrportionout of 'its normal axial pla'ne' anclpassing ai farm ing -tool throughoutsuch normal axial pl'ane $1 over such axial face of the ring.

6. The herein described! method 'ofxmak g ing piston rings, which consists inslittinga ring blank clrcumferentially into a succession of arcuateslots with; interspacedz unslit pom tions, and thereafter the'ri'ng. the side of said supported axial faceto the grindingone edge of 7; The herein described method of making piston rings which: consists in; s'littinggaring blank circumferentially into ar succession: of f arcuat'e slots with" inter-spaced unslit portions; and thereaftergrinding onefedge v ot the pposite edge of the ring is supported distortion :'or flexing? 85 The herein 5 described? method of ma'king piston rings, whicjh consists in slitting" a tions thereafter:"supportingthe ringblank upon flat surface and fholding it posi 'eri ii e expe'sediedge of the ring-w i le the ring is; ma netically; heldin'p ofsiti' o'nf i ""1 25 tion 'on' said surface b'ycmagnetismp-and 9} Theelierein-desc'rih' method-off tn'aking piston rings; which consists in 'cijrcumferena so 7 tially slotting a ring blank to form therein a succession of arcuate slots .With interspaced unslit portions, slit ring for engagement 'Wlth a fiat unyielding surface, and grinding the exposed edge of the ring While thus held firmlyin position. I

10. The herein sion of arcuate slots positioned With their" contiguous ends spaced apart and the slots of uniform Width throughout, and

bein thereafter surfacing one'edge of the blank.

In testimony whereof, Isign thi'sspecification.

EMIL KOTTUSCH;

magnetically holding the thus described method of making"- piston rings, Which consists in slotting a 7 ring blank circumferentially to form in the 

